<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title><?=$siteName?></title>
    <style>
        #page {
            width: 500px;
            height: 100vh;
            margin: 0 auto;
            display: block;
            position: absolute;
            left: 50%;
            -webkit-transform: translate(-50%,0);
            -moz-transform: translate(-50%,0);
            transform: translate(-50%,0);
        }
    </style>
</head>
<body>
<iframe id="page" src="<?=$url?>" frameborder="0"></iframe>
</body>
</html>